Sandoz Gmbh

Mbt Holding Ag

Construction Research & Technology Gmbh

Mbt (schweiz) Ag

Max Oppliger

Salvatore Valenti

Bernhard Leikauf

Josef F Drs

Gerhard Albrecht

Roland Mislin

Hanspeter Uehlinger

Thomas Kothe

Qiwei Yang

Karoly Disch&ouml;

Herbert Eichenberger

Hubertus Matthias Zink

Joseph V Diest

Werner Baumann

A fluidizing admixture for use with sprayable cementitious compostions, the admixture consists of 2-phosphonobutane-1,2,4-tricarboxylic acid and at least one selected polymer derived from ethylenically-unsaturated mono- or dicarboxylic acids. Citric acid may optionally be present. The admixture has good fluidizing properties and outstanding shelf-life.

Fluidising composition

The present invention refers to a settable mixture comprising (i) a water absorbing composition and (ii) an aqueous emulsion of organic polymer or (iii) dispersible organic polymer, wherein the water absorbing composition (i) contains inorganic ingredients which are capable to react with water and the water absorbing composition (i) contains at least 13 weight % lime and at least 5 weight % of a cementitious composition of which components form ettringite during the absorption of water and wherein the amount of the aqueous emulsion of organic polymer (ii) in relation to (i) is such as to provide a ratio of combined weight of polymer solids to combined weight of ingredients which are capable to react with water of from 0.5:1 to 10:1, preferably 1:1 to 4:1 and wherein the amount of dispersible organic polymer (iii) in relation to (i) is such as to give a ratio of combined weight of polymers to combined weight of ingredients which are capable to react with water of from 0.5:1 to 10:1, preferably 1:1 to 4:1.

Settable mixture containing lime, a cementitious composition and a polymer

Cement structure containing a waterproofing layer

Admixtures for cementitous compositions

A method for coating a substrate with a cementitious composition by spraying, comprising the addition to the initial cementitious mix one of a .beta.-naphthalene sulphonate-formaldehyde condensate and a water-soluble poly(alkylene oxide) of molecular weight from 100,000-8,000,000, the other being added at the spraying nozzle, there being additionally added at the nozzle (preferably as a single component with the other nozzle-added material) an accelerator selected from aluminium sulphate, aluminium hydroxide and aluminium hydroxysulphate. In a preferred embodiment, the material added at the nozzle also contains a superplasticiser.

Cement spraying admixture

Fluidity control of cementitious compositions

Compounds of the formula ##STR1## wherein each A, independently, is a ##STR2## wherein R.sub.1 is hydrogen, halo, C.sub.1-4 alkyl or C.sub.1-4 alkoxy,

Mixtures of a 1:1 copper or nickel complex of a stilbene-azo or

Metal-free azo compounds containing a vinylsulfonyl group and at least

Compounds of the formula ##STR1## in which R.sub.1 is C.sub.1-4 alkyl,

2-(C.sub.1-4 Alkoxy)carbonylamino-4-(2'-C.sub.1-4

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Allschwil, Switzerland

Max Oppliger